Which statements about roaming are TRUE? (Multiple Choice)

Which statements about roaming are TRUE? (Multiple Choice)
A . The APs an STA connects to before and after roaming must work in the same channel.
B . The APs an STA connects to before and after roaming can work in different channels.
C . During roaming, the STA sends a re-association request containing information about the original AP to the new A
E . During roaming, the STA sends an association request containing information about the original AP to the new A

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Answer: BC